638 THE FUNGI WHICH CAUSE PLANT DISEASE 



Melanconiaceae-Hyalosporse (p. 537) 

 Conidia hyaline, 1-celled, globose to oblong, rarely dilute colored. 



Key to Gensba of Melanconiaceae-Hyalosporae 



Conidia muticate 

 Masses, or acervuli, not setose 

 Conidia not catenulate 

 Conidia not allantoid 

 Masses briglit colored, subtremel- 



loid 1. Hainesia. 



Masses gray to black, rarely 



bright colored, waxy or homy 



Growing, for the most part, on 



leaves or fruits 2. Gloeospoiium, p. 539. 



Growing usually on twigs of trees 



or shrubs 3. Myxosporium, p. 546. 



Masses black, discoid, homy 4. Melanostroma. 



Conidia allantoid 5. Nsemospora, p. 547. 



Conidia in chains 

 Masses oblong, hysterioid, dark, 



hard 6. Hypodermium, p. 547. 



Masses discoid, pulvinate or conoid 



Masses bright colored, soft 7. Myxosporella. 



Masses dark to black 

 Conidiophores repeatedly 

 branched 

 Masses discoid; conidiophores 



dichotomous 8. Blennoria. 



Masses depressed-pulvinate; 



conidiophores verticillate 9. Agyiiella. 

 Conidiophores simple 

 Masses scutellate, olive or 



ashen 10. Myxonnia. 



Masses truncate, black below, 



pale above 11. Blozamia. 



Masses setose at margin; conidiophores 



short, fasciculate 12. Colletotrichuin,p. 547. 



Conidia aristate with a branched awn at 



apex 13. Pestalozziella. 



